/etc/gnome-vfs-mime-magic is in gnome-mime-data 2.18.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 | # Copyright (C) Eazel, Inc. 2000, 2001
#
# MIME magic patterns as used by the Gnome VFS library
#
# The format of magic entries is:
#
#     offset_start[:offset_end] pattern_type pattern [&pattern_mask] type
#
# <offset_start> and <offset_end> are decimal numbers (file offsets).
#
# <pattern_type> is (byte | short | long | string | date | beshort |
#                    belong | bedate | leshort | lelong | ledate).
#
# <pattern> is an ASCII string with non-printable characters escaped
# as hex or octal escape sequences, and spaces and other important
# whitespace escaped with '\'.
#
# <pattern_mask> is a string of hex digits. The mask must be the same
# length as the pattern.
#
# <type> is a valid MIME type.
#
# Order magic patterns such that ambiguous ones (such as
# application/x-ms-dos-executable) are at the end of the list and
# therefore get applied last.
#
# Avoid rules that require a seek deep into the examined file. If you
# must, locate such rules at the end of the list so that they get
# applied last
#
# When designing new document formats, make them easily recognizable
# by defining a sufficiently unique magic pattern near the document
# start. A good pattern is at least four bytes long and contains one
# or two non-printable characters so that text files won't be
# misidentified.
0	string		%PDF-					application/pdf
0	string		\177ELF\ \ \ \ \ \ \ \ \ \ \ \ \004 &0xffffffff000000000000000000000000ff application/x-core-file
0	string		\177ELF\ \ \ \ \ \ \ \ \ \ \ \ \003 &0xffffffff000000000000000000000000ff application/x-shared-library
0	string		\177ELF					application/x-executable-binary
# Disable zip because detecting StarOffice files correctly is more imporant in the release
# than detecting the occasional zip file without an extension
#0	string		PK\003\004				application/zip
0	string		\004%!					application/postscript
0	string		\000\000\001\272			video/mpeg
0	string		\000\000\001\263			video/mpeg
# .mmv, mpeg transport stream created by movieshaker
0       string          \x47\x3f\xff\x10                        video/mpeg
0	string		\377\330\377				image/jpeg
# The below ignores the details available (architecture, type, version)
0	string		\xed\xab\xee\xdb			application/x-rpm
0	string		Rar!					application/x-rar
0	string		GIF8					image/gif
4	string		ftypM4A					audio/x-m4a
4	string		moov					video/quicktime
4	string		mdat					video/quicktime
8	string		mp42					video/quicktime
12	string		mdat					video/quicktime
36	string		mdat					video/quicktime
0	belong		0x3026b275				video/x-ms-asf
0	string		ASF\ 					audio/x-ms-asx
0	string		\<ASX					audio/x-ms-asx
0	string		\<asx					audio/x-ms-asx
0	string		MThd					audio/x-midi
0	string		IMPM					audio/x-it
0	string		\x1f\x07\x00\x00 &0xffffff00		video/dv
2	string		-lh0-					application/x-lha
2	string		-lh1-					application/x-lha
2	string		-lz4-					application/x-lha
2	string		-lz5-					application/x-lha
2	string		-lzs-					application/x-lha
2	string		-lh\40-					application/x-lha
2	string		-lhd-					application/x-lha
2	string		-lh2-					application/x-lha
2	string		-lh3-					application/x-lha
2	string		-lh4-					application/x-lha
2	string		-lh5-					application/x-lha
20      string		\375\304\247\334			application/x-zoo
0	string		StuffIt\ 				application/x-stuffit
11	string		must\ be\ converted\ with\ BinHex	application/mac-binhex40
102	string		mBIN					application/x-macbinary
4	string		gtktalog\ 				application/x-gtktalog
0	string		diff\ 					text/x-patch
0	string		Index:					text/x-patch
0	string		***\ 					text/x-patch
0	string		Only\ in\ 				text/x-patch
0	string		Common\ subdirectories:\ 		text/x-patch
0	string		FONT					application/x-font-vfont
0	string		IIN1					image/tiff
0	string		MM\x00\x2a				image/tiff
0	string		II\x2a\x00				image/tiff
0	string		\x89PNG					image/png
0	string		8BPS\ \ \000\000\000\000 &0xffffffff0000ffffffff image/x-psd
0	string		#LyX					text/x-lyx
0	string		DCMw					image/x-dcm
0	belong		0x59a66a95				image/x-sun-raster
0	belong		0x01da0000 &0xfcfeffff			image/x-sgi
0	belong		0xb168de3a				image/x-pcx
0	string          \x28\x00\x00\x00                        image/x-dib
0	string          SIMPLE\ \ =                             image/x-fits
0	belong          0x46506978                              image/x-fpx
0	belong		0x00000200				image/x-icb
0	belong		0x53445058				image/x-dpx
0	string		d8:announce				application/x-bittorrent
8	string		matroska				application/x-matroska
# Desktop file support - slightly wrong, since comments can be before
# the [Desktop Entry] line in the current spec - probably should fix
# desktop entry spec to allow this
0:32   string          [Desktop\ Entry]                        application/x-gnome-app-info
# Theme ("Metatheme") support
0:40   string          [X-GNOME-Metatheme]                     application/x-gnome-theme
# special Nautilus link type
0:32	string		\<nautilus_object\ nautilus_link	application/x-nautilus-link
# special GMC link type
0:32	string		\URL:					application/x-gmc-link
# xpm rule needs to go before text/x-c
0	string		/*\ XPM\ */				image/x-xpixmap
0:64	string		\<!DOCTYPE\ xbel			application/x-xbel
0:192	string		\<xbel					application/x-xbel
0:64	string		\<!DOCTYPE\ NETSCAPE-Bookmark-file-1\>	application/x-mozilla-bookmarks
0:64	string		\<!DOCTYPE\ NETSCAPE-Bookmark-file-1\>	application/x-netscape-bookmarks
0:64	string		\<ephy_bookmarks			application/x-epiphany-bookmarks
# svg rules need to go before html
0:256	string		\<!DOCTYPE\ svg				image/svg+xml
0:64	string		\<svg					image/svg+xml
0:64	string		\<chemistry				application/x-gchempaint
0:64	string		\<crystal				application/x-gcrystal
0:256	string		\<display				application/x-gdesklets-display
# php rules need to go before html
0:64	string		\<?php					application/x-php
0:64	string		\<smil\>				application/x-smil
0:64    string		\<SMIL\>				application/x-smil
0:64	string		\<!DOCTYPE\ HTML			text/html
0:64	string		\<!doctype\ html			text/html
0:64	string		\<HEAD					text/html
0:64	string		\<head					text/html
0:64	string		\<html					text/html
0:64	string		\<HTML					text/html
0:64	string		\<dia:diagram				application/x-dia-diagram
0:64	string		\<abiword				application/x-abiword
0:64	string		\<\!DOCTYPE\ abiword			application/x-abiword
0:64	string		gmr:Workbook				application/x-gnumeric
0:64	string		\<project				application/x-mrproject
# text/xml content detection needs to be after all the xml-derived formats
0:64	string		\<?xml					text/xml
0	string		{\\rtf					application/rtf
0	string		#!/bin/sh				text/x-sh
0	string		#!/bin/bash				text/x-sh
0	string		#!/bin/csh				text/x-csh
0	string		#!/bin/ksh				text/x-ksh
0	string		#!/bin/perl				text/x-perl
0	string		#!/bin/zsh				text/x-zsh
1:16	string		/bin/sh					text/x-sh
1:16	string		/bin/bash				text/x-sh
1:16	string		/bin/csh				text/x-csh
1:16	string		/bin/ksh				text/x-ksh
1:16	string		/bin/perl				text/x-perl
1:16	string		/bin/python				text/x-python
0	string		BEGIN:VCARD				text/x-vcard
0	string		BEGIN:VCALENDAR				text/calendar
8	string		CDR\ vrsn				application/vnd.corel-draw
8	string		AVI\ 					video/x-msvideo
0	string		MOVI					video/x-sgi-movie
0	string		.snd					audio/basic
8	string		AIFC					audio/x-aifc
8	string		AIFF					audio/x-aiff
0	string		.ra\375					audio/x-pn-realaudio
0	belong		0x2e7261fd				audio/x-pn-realaudio
0	string		.RMF					audio/x-pn-realaudio
8	string		WAVE					audio/x-wav
8	string		WAV\ 					audio/x-wav
0	string		RIFFxxxxCDXA &0xffffffff00000000ffffffff	video/mpeg
0	string		RIFF					audio/x-riff
0	string		OggS					application/ogg
0	string		pnm:\/\/				audio/x-real-audio
0	string		rtsp:\/\/				audio/x-real-audio
0	string		SIT! 					application/x-stuffit
0	string		\312\376\272\276			application/x-java-byte-code
0	string		Joy!					application/x-pef-executable
4       string		\x11\xAF				video/x-fli
4       string		\x12\xAF				video/x-flc
0	string		\x31\xbe\x00\x00			application/msword
0       string  	PO^Q`           			application/msword
0	string		*BEGIN\ SPREADSHEETS			application/x-applix-spreadsheet
0	string		\x00\x00\x02\x00			application/vnd.lotus-1-2-3
0	string		PSID					audio/prs.sid
31      string		Oleo					application/x-oleo
0	string		FFIL					application/x-font-ttf
65	string		FFIL					application/x-font-ttf
0	string		LWFN					application/x-font-type1
65	string		LWFN					application/x-font-type1
0	string		StartFont				application/x-font-sunos-news
0	string		\x13\x7A\x29				application/x-font-sunos-news
8	string		\x13\x7A\x2B				application/x-font-sunos-news
0	string		%!PS-AdobeFont-1.			application/x-font-type1
6	string		%!PS-AdobeFont-1.			application/x-font-type1
0	string		%!FontType1-1.				application/x-font-type1
6	string		%!FontType1-1.				application/x-font-type1
0	string		STARTFONT\040				application/x-font-bdf
0	string		\001fcp					application/x-font-pcf
0	string		D1.0\015				application/x-font-speedo
0	string		\x14\x02\x59\x19			application/x-font-libgrx
0	string		\xff\x46\x4f\x4e			application/x-font-dos
7	string		\x00\x45\x47\x41			application/x-font-dos
7	string		\x00\x56\x49\x44			application/x-font-dos
0	string		\<MakerScreenFont			application/x-font-framemaker
0	string		\000\001\000\000\000			application/x-font-ttf
1       string          WPC        				application/x-wordperfect
0	string		ID;					text/spreadsheet
0	string		MZ					application/x-ms-dos-executable
0	string		%!					application/postscript
0       string          BZh                                     application/x-bzip
0	string		\x1f\x8b				application/x-gzip
0	string		\037\235				application/x-compress
0	string		\367\002				application/x-dvi
0	string		\367\203				application/x-font-tex
0	string		\367\131				application/x-font-tex
0	string		\367\312				application/x-font-tex
2	string		\000\022				application/x-font-tex-tfm
0	string		\x36\x04				application/x-font-linux-psf
0	string		FWS					application/x-shockwave-flash
0	string		NSVf					video/x-nsv
0	string		BMxxxx\000\000 &0xffff00000000ffff	image/bmp
0	string		AT&TFORM				image/vnd.djvu
0	string		Return-Path:				message/rfc822
0	string		Path:					message/news
0	string		Xref:					message/news
0	string		From:					message/rfc822
0	string		Article					message/news
0	string		Received:				message/rfc822
0	string		[playlist]				audio/x-scpls
0	string		[Reference]				video/x-ms-asf
22	string		\<EDL					application/x-cinelerra
32769	string		CD001					application/x-iso-image
37633	string		CD001					application/x-iso-image
32776	string		CDROM					application/x-iso-image
0       string          OTTO                                    application/x-font-otf
54	string		S\ T\ O\ P				application/x-ipod-firmware
0:160	string		fLaC					audio/x-flac
0:160	string		ID3\x20\x00				audio/mpeg
0:160	string		ID3\x30\x00				audio/mpeg
0:160	string		ID3\x40\x00				audio/mpeg
0:512	string		\x00\x00\x01\xba			video/mpeg
0	string		BLENDER					application/x-blender
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